Nut lock



R. l. CLAPP May 10 1927.

NUT LOCK Filed July 15, 1925 .TE EIES Patented May 10, I927.

U I EDSTATES PATENT o' ric 7 noeoua I. opera, on is r'ranenar, crime, 3

i NUT oon.

Application filed July 13,1925. sm-.11 No. 43,118. g

10 each side of the plate immediately to the leftof said point of increased radius extending almost the full width of the plate, al lowing but a slight opposite bevel'on the other side of the plate,-aiid the bevel oneach side tapering'from the said point of greatest radius to the left about the hole,'i. e., in a counterclockwise direction until as it approaches thefpoint ofgreatest radius on '7 the right, it almostdisappears. The increase of radius gives the r an eh line. I a V The bevelling as described causesthe edge of the aperture when the lock' washer .is tightened up, to act for about five-sixths' of 'its circumference as" a circular wedge between the thread against which it rests above and the surface of the nut,the point of the wedgebeing in. effect immediately at the left 1 of the point of greatest radius and the butt at the right of the same when the bolt thread is righthanded.

In practice one, two or more of the locking plates or washers may be used with a nut or several of the plates may be used without a nut, and with the nut it'may be used either as a washer under the nut or as a lock nut over the nut, or two of the locking plates may be used, one under the nut.

as a washer and the other over it, and to give increased security, the locking plate may be bent about the nut or otherwise fastened, or the wedging action of the locking plate may be relied upon to give the desired effect withoutother provisions for locking. V In the V accompanying drawing I have illustrated nut-and bolt locking means'embodying my invention.

In the drawing'-- V Figure 1 is a plan of the nut locking plate or washer.

- Figure 2 is a section looking in the direction of arrow;2 from line 3, 3 Figure 1.

Figure 3 is a section-on the line3, 3 of v Figure 4 is an Figure 1, looking inv the direction'of arrow 3.

elevation of a bolt'havingthe locking-plate engaged therewith tand showing'the angle of the plate before it isdeflected by forcing against a flat surface in looking.

Figure 5 is a section parallelto the axis through a locking plate or washer having the edge'cut'away on account of 'the thickness of the plate looking at 'tliepoint of greatest'radius. of the opening. The section v is taken on line 5. 50f Fi ure 6..

Figure6 is a plan of'the same lookingat' the side opposite the cut-away portion.

o Figure 7 is aplan' lookin at the opposite or cutawayside. of the plat e *Figur 8 is" an elevation of a nut and.

bolt,and parts held thereby, the bolt being-" i secured by means of two locking plates, one

being 'used'asa washer and the other as a 'lock'nut. i 1 Figure 9 is a top plan of thesame;

shown in elevation.

: Referring to the drawings byrumerals, each of which is used toind cate the-same or similar parts in the different figures, the nut l is held in position on the bolt 2 by means of locking plates or lock washers 3, the plate having its aperture 4" which rethread, so that the plate on one side of this 1 point rests in one turnof' the groove, and on r the oppositev side in the next turn of the groove, the point of greatest radius by Figure 10 is a section ithrough, a nut sc cured by two locking plates, the bolt being crossing the thread,1-enable's the plate with a bore, the diameter of which-is only sufficiently in excess of that atthe base of the groove, to permit the plate to fit in and slide along the base of the groove topass on to. the threaded portion of the bolt. \Vithout this point ,6 of'excess radius, the

"bolt would not enter the. aperture at all.

The bevel 5 on opposite sides of the plate L thus engaging the thread for approximately five-sixths of the circumference, forms a illustrai'od inlFig'uro ll), lhr

circular wedge \Yhivh can bc :lorood bolwvron tho surface of tho unit or other nnunbor through which lzlio bolli-is passed and llio thread, }i)10(li](.l1l1' the looking; ii 'li ii which is the function of tho device.

Itmay be said in :lurthor ox )1un:1lion oil the wedge action and ofi'l'ie form nndloca visible bevel is in alnv! Put away by tho op posito bore] {18 i ho visible bowl is :lollon'vd, to the: \it. The description rolnlvs lo i'ho handed thi'ond. i

To assenibleinndilorli :1 ho nnd nut :is

oh in ,li-rsl; lllSOlllWl, iho lurking ])l2ll(i i nlhon nnssod over l lHJOIHl oil iho boll and sii-ron'oil down against l'ho work 8. Tho nul' l in (him uorowod down ngziinsl': tho pinto 3 whiohlms been not tight in i-iglit'lmndod roinlion in uooordmn'ie \Vllll tho (lireotion of The 'lillrozufl shown. :indfori'oddon'n Hui. :indn second washer or plate 3 then passed ovor the and of the bolt and turned r lown tig'ht and flat against the nut. Two phil'es RKO not, however, ordinarilyirogzurded us HOCLHEHIY, and where a singlelkmking plain in used. it

is preferably applied over the nut illlil' the manner of a lock nut. i i i In Figure 7 I have shown :1 looking plate 9 of excess illllClCIlQMi. In this jinstm'ice to disponso with the surplus metal about the 4.0 opening, .I. have ominter-sunk or ()l'llGl'WlSQ l't'BlllOVCd :1 portion of lheuinetnl around l'ho hol 1 nb 10 so 215 to give :1 thin edge/ill of u lhii'zln' osu :ipproximotel Hint of the looking plate 25. The edge 11 is then bevelled as 45 originally dosorilied.

ln opornliin'i the bevel. 7 at the left of the point 6 lends and t'lUl'S as the point of a 'n'od' 'o between the bolt lllI'OlHl and the flat HUJ'lHLO ol' the nut. l'ho odgo oil? the plate at 50 ho i.'i; .=.'lil Col point (i bi-iin g'il'hu hull of the \vodgo which in tiglurninpj o'l'ilhr plate is lorcod lioln'ooli (ho tlu oinl nnd tho ourfnoo oil? (he not or olhor niumboif inwhich the bolt in boinglooked wodggings m looking; tho fifi boll rolniively to tho nuly i j j lilziving' thus (lOE-('lll) (l my invention, what 1 L'lilllll and dosh-o to socuroby Loti'ers ljzil'enl' is: i l

ln ronibinnl ion wil'h'n ilu'eiuledboll? ;\11(Lln60 in width about the oircum'licrcnco 0f the opening: in opposite directions of; rotation, lho opening having an point of increased diumoteulio allow the ,liovelfto (gross Hie-M70 thread. tho inorezisod diameter hoing prodncodby Tho nioeting of tho lnzixinnun bur- 91s on the opposite Sl(l(.,ll1\(lllll plate lying flzrlaiinlocked position. i v

Signed by moi at Shanghai, China, this 76 15th (lay of Juno 1925. r i i Rooini; I. GnliPPQ 

